Antifreeze system for tunnel drainage ditch

Abstract

The invention discloses an anti-freezing system of a tunnel drainage ditch. The anti-freezing system of the tunnel drainage ditch comprises the tunnel drainage ditch, a water storage pond and a heat insulation layer arranged on the periphery of the tunnel drainage ditch. The water level of the water storage pond is lower than an inlet of the tunnel drainage ditch. An outlet of the tunnel drainage ditch penetrates through a side wall of the water storage pond and is located underwater in the water storage pond at a set depth, so that tunnel discharged water, flowing into the tunnel drainage ditch through the inlet flows out through the outlet. The set depth is larger than the water freezing depth of the area where the tunnel drainage ditch is located. According to the technical scheme, the heat insulation layer arranged on the periphery of the tunnel drainage ditch and liquid water, where the outlet of the tunnel drainage ditch is submerged, in the water storage pond can prevent discharged water in the tunnel drainage ditch from being frozen, so that damage of water in a tunnel or underwater outside the tunnel to the tunnel structure is avoided, and the safety of the tunnel is improved.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to an antifreeze system for tunnel drains. Background technique [0002] With the development of our country's infrastructure, a large number of tunnels have been excavated, built and put into use. [0003] The current tunnel drainage system usually includes a tunnel drainage ditch; the schematic diagram of the longitudinal section of the tunnel drainage ditch is shown in figure 1 As shown, its entrance is usually located in the tunnel or near the outer surface of the tunnel, and its exit is located on the ground where the ground elevation is lower than its entrance; the drainage in the tunnel drainage ditch flows from the entrance to the exit, and a part of the tunnel drainage ditch and its exit are usually exposed in the air. [0004] When the outdoor air temperature drops below zero, the residual water at the exit of the tunnel drainage ditch is likely to freeze into ice, and ...

AI Technical Summary

Problems solved by technology

[0004] When the outdoor temperature drops below zero, the residual water at the exit of the tunnel drainage ditch is likely to freeze into ice, and the ice may block the tunnel drainage ditch, causing the tunnel drainage ditch to lose its drainage function

If the entrance of the tunnel drainage ditch is located in the tunnel, it is easy to cause accumulated water in the tunnel; when the temperature in the tunnel is low, the accumulated water in the tunnel is likely to freeze into ice; because the water freezes into ice, the volume increases Increased hardness can easily cause frost heaving of structures soaked in water in the tunnel (such as lining, etc.) and cause problems such as cracking, brittleness, and peeling, which seriously threaten the safety of vehicles and personnel passing through the tunnel

If the entrance of the tunnel drainage ditch is located near the outer surface of the tunnel, it will easily lead to the accumulation of groundwater on the outer surface of the tunnel, which will generate additional water pressure on the initial support structure of the tunnel, and will easily cause problems such as tunnel water leakage, cracking or even collapse of the supporting structure, which is serious. Threats to the safety of vehicles and people passing through the tunnel

The relevant departments of the road operation in the tunnel usually need to spend a lot of manpower and material resources to clear the ice of the tunnel drainage ditch every year, which is inefficient and expensive

[0005] To sum up, the existing tunnel drainage ditch has the defect that the outlet is easy to freeze, which affects the safety of the tunnel; therefore, it is necessary to provide an antifreeze system that can avoid the freezing of the tunnel drainage ditch outlet to improve the safety of the tunnel

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